diff -u gdm-2.30.2.is.2.30.0/debian/changelog gdm-2.30.2.is.2.30.0/debian/changelog
--- gdm-2.30.2.is.2.30.0/debian/changelog
+++ gdm-2.30.2.is.2.30.0/debian/changelog
@@ -1,3 +1,9 @@
+gdm (2.30.2.is.2.30.0-0ubuntu5) lucid-proposed; urgency=low
+
+  * Initialize length for XdmcpFill, fixes XDMCP logins (LP: #697112)
+
+ -- Alkis Georgopoulos <alkisg@gmail.com>  Fri, 07 Jan 2011 02:02:24 +0200
+
 gdm (2.30.2.is.2.30.0-0ubuntu4) lucid-proposed; urgency=low
 
   * debian/gdm.upstart: Do not already fire on a framebuffer device. When a
only in patch2:
unchanged:
--- gdm-2.30.2.is.2.30.0.orig/daemon/gdm-xdmcp-display-factory.c
+++ gdm-2.30.2.is.2.30.0/daemon/gdm-xdmcp-display-factory.c
@@ -2842,6 +2842,8 @@
                 return TRUE;
         }
 
+        ss_len = sizeof(clnt_ss);
+
         res = XdmcpFill (factory->priv->socket_fd, &factory->priv->buf, (XdmcpNetaddr)&clnt_ss, &ss_len);
         if G_UNLIKELY (! res) {
                 g_debug ("GdmXdmcpDisplayFactory: Could not create XDMCP buffer!");